diff --git a/tests/providers/test_alias.py b/tests/providers/test_alias.py
index f246e20..d5a6c5f 100644
--- a/tests/providers/test_alias.py
+++ b/tests/providers/test_alias.py
@@ -32,12 +32,6 @@ def test_alias_delegates_to_source() -> None:
     assert concrete is abstract
 
 
-def test_alias_resolve_provider() -> None:
-    container = Container(groups=[MyGroup])
-    instance = container.resolve_provider(MyGroup.abstract_repo)
-    assert isinstance(instance, PostgresRepository)
-
-
 def test_alias_without_caching_returns_fresh_instance_per_call() -> None:
     class G(Group):
         repo = providers.Factory(creator=PostgresRepository)
diff --git a/tests/providers/test_factory.py b/tests/providers/test_factory.py
index e561a3d..deb9d87 100644
--- a/tests/providers/test_factory.py
+++ b/tests/providers/test_factory.py
@@ -39,7 +39,6 @@ class MyGroup(Group):
         creator=SimpleCreator, skip_creator_parsing=True, bound_type=None
     )
     func_with_union_factory = providers.Factory(creator=func_with_union, bound_type=None)
-    func_with_broken_annotation = providers.Factory(creator=func_with_broken_annotation, bound_type=None)
     request_factory = providers.Factory(scope=Scope.REQUEST, creator=DependentCreator)
     request_factory_with_di_container = providers.Factory(scope=Scope.REQUEST, creator=AnotherCreator)
 
@@ -72,13 +71,17 @@ def test_app_factory_unresolvable() -> None:
 def test_func_with_union_factory() -> None:
     app_container = Container(groups=[MyGroup])
     instance1 = app_container.resolve_provider(MyGroup.func_with_union_factory)
-    assert instance1
+    assert instance1 == str(SimpleCreator(dep1="original"))
 
 
 def test_func_with_broken_annotation() -> None:
-    app_container = Container(groups=[MyGroup])
+    with pytest.warns(UserWarning, match="Failed to resolve type hints"):
+        factory = providers.Factory(creator=func_with_broken_annotation, bound_type=None)
+
+    app_container = Container()
+    app_container.providers_registry.add_providers(factory)
     with pytest.raises(ArgumentResolutionError, match="Argument dep1 of type None cannot be resolved"):
-        app_container.resolve_provider(MyGroup.func_with_broken_annotation)
+        app_container.resolve_provider(factory)
 
 
 def test_request_factory() -> None:
diff --git a/tests/test_container.py b/tests/test_container.py
index 3393412..00f4660 100644
--- a/tests/test_container.py
+++ b/tests/test_container.py
@@ -62,7 +62,7 @@ def test_container_resolve_missing_provider() -> None:
         ProviderNotRegisteredError,
         match=r"Provider of type <class 'str'> is not registered in providers registry.",
     ) as exc:
-        assert app_container.resolve(str) is None
+        app_container.resolve(str)
     assert exc.value.provider_type is str
 
 
@@ -143,7 +143,9 @@ def test_validate_detects_cycle() -> None:
         container.validate()
     [issue] = exc.value.errors
     assert isinstance(issue, CircularDependencyError)
-    assert issue.cycle_path == ["CycleA", "CycleB", "CycleA"]
+    cycle = issue.cycle_path
+    assert cycle[0] == cycle[-1]
+    assert set(cycle) == {"CycleA", "CycleB"}
 
 
 def test_validate_passes_for_valid_graph() -> None: